8399210009 has 8 divisors (see below), whose sum is σ = 8894373480. Its totient is φ = 7904167936.

The previous prime is 8399209997. The next prime is 8399210023. The reversal of 8399210009 is 9000129938.

It can be written as a sum of positive squares in 4 ways, for example, as 414000409 + 7985209600 = 20347^2 + 89360^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8399210009 - 2²⁰ = 8398161433 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8399210069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139217 + ... + 190209.

It is an arithmetic number, because the mean of its divisors is an integer number (1111796685).

Almost surely, 2^8399210009 is an apocalyptic number.

It is an amenable number.

8399210009 is a deficient number, since it is larger than the sum of its proper divisors (495163471).

8399210009 is a wasteful number, since it uses less digits than its factorization.

8399210009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60699.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 8399210009 is about 91647.2040435495. The cubic root of 8399210009 is about 2032.7289859196.

The spelling of 8399210009 in words is "eight billion, three hundred ninety-nine million, two hundred ten thousand, nine".